P11CB GMC - Nox Sensor 1 Performance Signal High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P11CB GMC Possible Causes

  • Faulty Nox Sensor 1
  • Nox Sensor 1 harness is open or shorted
  • Nox Sensor 1 circuit poor electrical connection
  • Intake System Leaks
  • Exhaust System Leaks

How do I fix code P11CB GMC?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Cost of diagnosing the P11CB GMC code

Labor: 1.0

The cost of diagnosing the P11CB GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P11CB GMC Description

The Powertrain Control Module (PCM) monitors the Nox Sensor 1. The PCM sets the OBDII code when the Nox Sensor 1 is not to factory specifications.
OBDII Code P11cb Gmc - Nox Sensor 1 Performance Signal High  - AutoCodes.com

More Information

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